Movements rooted in contraction are sticky. Grindy. Friction. In order to be sticky, you have to contract.

Movements rooted in relaxation springy. Bouncy. Ballistic. In order to be springy, you have to relax.

Muscle is a byproduct of honest sticky movement.

You decide to walk slow and sticky up the steps, but you could leap quick and bouncy up those same steps. So walking up the steps isn't an honest sticky movement.

A good marker to qualify honest sticky movements: can you be springy or leave the surface of the earth?

If you can spring with control and power, you have stickiness. Babies are mostly spring with little stick, which is why they lack control. They bounce around like a pinball. And smile.

Your lower body is already springy and sticky. But imagine using your hands as feet. You wouldn't do clapping handstand push-ups on day one. You have to go through a lot of sticky training (holding the handstand, handstand push-ups) before you’d be able to tap into your springs.